1. Bell Work Put in Scientific Notation 360 000000 g __________________
Top of page 15
Put in Scientific Notation
g __________________
48000 m ______________________
cm ____________________
X (DO THE OPPOSITE)___________

2. Dimensional Analysis Page 13 of Notebook
Scientific Notation &
Dimensional Analysis
Page 13 of Notebook

3. Ojective: Write numbers in Scientific Notation
Evaluate word problems using Scientific Notation
Evaluate Dimensional Analysis

4. Main Idea
Read Aloud Page 40

5. WHAT IS SCIENTIFIC NOTATION?
A SHORT WAY TO WRITE VERY SMALL OR VERY LARGE NUMBERS
1,000,000,000,000 cm
1.0 X cm

6. Rules for Scientific Notation
Page 12
Put the Decimal after the 1st digit and drop the zeroes
To find the exponent count the number of places from the end of the number.
x 103

7. Guided Practice: Turn to Page 40 in your chemistry text book
Example Problem 2.2:
The diameter of the sun is 1,392,000 km
The density of the sun’s lower atmosphere is
g/cm3

8. Rules for Multiplication/Division in Scientific Notation
Page 14
Multiplication
Division
Multiply Coefficients
2. Add the exponents (base 10 remains)
Divide the coefficients
Subtract Exponents (base 10 remains).

9. Page 41; Problems 11 & 12 Page 42; Problems 15 & 16
Independent Practice
Page 41; Problems 11 & 12
Page 42; Problems 15 & 16

10. What is Dimensional Analysis?
A systematic approach to solving problems that using conversions factors.
Conversion factor-ratio of equivalent factors
Example: 1000 meter = 1 kilometer or
1km
1000m
Reciprocal ?

11. Guided Practice
Page 45; Problems

12. Classwork/The Price of Gasoline
Assume that the Gasoline in Europe cost $0.989 per liter and the current price is $2.59 per gallon in the United States. Which country has the lowest price.
1L = 1 quart 4 quarts = 1 gallon

13. Answer to Group Activity 1
$3.96 /gallon The European Gas is extremely expensive.

14. Extra-Credit/Cooking Conversion
The density of peanut oil is g/mL. There are 237 mL in a measuring cup. If a recipe calls for ¼ cup of peanut oil, How many grams of peanut oil are required(hint: .250= ¼ ) ?

15. Answer to Group Activity 2
54.4 grams